If a Loving Creator exists, and if it wanted us to have proof of its existence, we would have proof that would leave us no doubt. Therefore, either a Loving Creator doesn't exist or it has a good reason for keeping us in the dark about its existence.
If a Loving Creator exists and wants us to have free will along with moral guidance, we would be born with a simple, universal (meaning cross-cultural) moral guidance system. I think we probably have such a system -- and although it wouldn't be compelling evidence that a Loving Creator exists, it's enough to create the suspicion in my mind.
Over the last 30 years or so, science has been heading toward the intuitionist theory to explain conscience and away from the rationalist theory. This is the beginning of support for my hypothesis of a universal conscience. Here's a small sample:
From the New York Times: "According to Yale psychologist Paul Bloom, humans are born with a hard-wired morality. A deep sense of good and evil is bred in the bone. His research shows that babies and toddlers can judge the goodness and badness of others' actions; they want to reward the good and punish the bad; they act to help those in distress; they feel guilt, shame, pride, and righteous anger."
